Dead-key attachment eos



I). PETERMANN.

DEAD KEY ATTACHMENT FOR TYPE WRITING MACHINES.

APPLICATION FILED NOV. 8. I9I2. RENEWED MAY I9, I9I6.

Patented Aug. 15, 1916.

5 W00 wto'c 3%.; I tocmuf UNITED STATES PATENT OFFICE.

OTTO PETERMANN, F GROTON, NEW YORK, ASSIGNOR TO CORONA TYPEVZ'RITER COMPANY, INCORPORATED, A CORPORATION OF NEW YORK.

DEAD-KEY ATTACHMENT FOR TYPE-WRITIN G MACHINES.

Specification of Letters Patent.

Patented Aug. 15, 1916.

Application filed November 8, 1912, Serial No. 730,248. Renewed May 19, 1916. Serial No. 98,671.

1 '0 all whom it may concern:

Be it known that I, O'r'ro PETERMANN, a citizen of the Republic of Switzerland, and a resident of Groton, county of Tompkins,

and State of New York, have invented cer tain new and useful Improvements in Dead- Key Attachments for Type- Writing Machines, of which the following is a full, clear, and exact description.

The main object of the invention is to provide \neans by which a character may be printed without-the usual letter-spacing movement of the carriage, the key used for such character printing being termed a dead key. The term dead is used to indicate that the key does not operate the means for moving the carriage for letter spacing.

Another object of the invention is to provide means whereby the dead key attachment will be adapted for use in a typewriting machine wherein the platen carriage has a series of vertical shifts for the purpose of bringing into operation the upper and lower case type.

A further object of the invention is to provide simple means whereby the dead key may be transformed into a live key, the operation of the key thereafter actuating t'he carriage moving means.

With these and other objects in view, the invention will be hereinafter more particu larly described with reference to the accompanying drawings, which form a part of this specification, and will then be pointed out in the claims at the end of the description.

In the drawings, Figure 1 is a longitudinal ver ica] sectional view of a portion of a typewriting machine showing my dead 4 key attachment applied thereto; Fig. 2 a

detail plan view of the dead key attachmentfFig. 3 a vertical sectional View on the line IIIIII of Fig. 2.

While the invention is shown as applied to a typewriting machine substantially like that disclosed in my Patent No. 1121,04 0, dated December 15, 1914, it will, of course, be understood that it may be applied to typewriting machines of various kinds and i constructions.

The frame 10 may be of any suitable construction, and extending transversely between the sides thereof are rods or supports 11 on which the key levers are suspended.

The uni\ ersal bar 12 extends transversely of the machine over the key levers, said bar being held at its ends by links 13, said links being connected at 14 with the arms 15 .of the bell-crank levers 16, there being, of course, two of such levers, one at each side of the machine. The upper ends of the for wardly extending arms of these levers are connected by a transverse rod 17 and this rod normally works in a vertical slot 18 in the upper end of a rock arm 19, there being two of such arms, one on each side of the machine. These arms are held to rock back and forth on the transverse rod 20, at the bottom of the frame, at each movement of the key levers and as each key lever, or the space bar, is depressed. Extending transversely of the machine and rigidly secured to the upper end of the arms 19 is a rocker bar 21 so that said bar will rock with the arms 19 at each reciprocation of the universal bar. The platen carriage bed 22 may be suitably supported to move vertically and on this bed is carried a platen carriage 23 sup porting the usual printing platen 24. As

forming a part of a platen shift mechanism is held at one end to the rod 20 and at its other end is a rod or shaft 24 by which the arm may be rocked and the slides 24 arms 19, support 24* and platen carriage may be given a series of shift movements. Carried by the carriage bed is the escapement device which controls the letter spacing movement of the carriage. The dog carrier 25 is formed with the U-shaped integral portion 26 which is adapted to be engaged by the rearwardly extending arm of the es capement operating lever, as will be more fully hereinafter described. The dog car-' rier 25, shown in section in Fig. 1, may be of substantially the same construction as the dog carrier shown in my Patent No. 1,121,040, referred to, or it may be of any other suitable construction.

The parts thus far described may be of any suitable construction.

Mounted within the main frame on the machine and at one side is a bracket 27 in which is arranged a vertically reciprocable Pivoted on. the bracket. at the lower end thereof is a releasing lever 34: to one; end of which 18 connected a strong s .)r-i-ng'85, said spring normally throwing downwardly the inner end of the said lever. The inwardly extending arm of said lever overlies the hook formed on the lower end of the controller bar and forces the same downwardly, the spring 35 being considerably stronger than the spring 30 connected tothe controller bar. The inner end of the releasing lever is formed with one or more downwardly eX-. tending fingers 36 which are adapted to engagethe upper edges of the character printing key levers 37, so that upon the depression of a keylever the said releasing bar will be raised, thereby releasing the controller barand permitting it to be lifted by its spring 30 until the stop pin 29 comes in contact with the bracket.

Pivotcd on the rocker baris an escapement operating lever '38, one arm ofwhich extends rearwardly and forms the escapement operating tappet' 39; The other arm of this lever extends laterally to the side of the machine, as shown clearly in Fig. 2 and normally lies in the path ofone of the slots 32 in the upper end of the cont-roller bar so that in the ordinary operation of the; rocker bar by the usual .live keys the free end of said escapeinentoperating lever will move rearwardlygin said slot and operate the escapemcnt mechanism. If, however, the dead key 37 be struck the rcleasing lever will be raised, thereby permitting the controller bar vto'be lifted by its spring 30 until the stop pincontacts with the "bracket, This will bring one of the forwardly projecting stops 31 directly in the path of the end of the escapement operating lever and prevent said lever-swingingbackwardly with the rocker bar. There are three stops 31 on the conroller bar 28 to adapt the lever 38 to engage-one of them when the dead key is depressed {during any one of the shift movements, or permit said lever to pass by said stops when the ordinary keys are depressed. It is manifest, therefore, that when the dead key 37 is depressed the escapcment operat ing lever will be first locked at its free end against free movement and the rocker bar will then swing rearwardly under the influence of vthe universal bar. be that the escapement operating lever will Patent The result will The escapement operating lever is held. in I its normal position with respect to the rocker .bar by means of a spring &0 extending-between said lever and the rocker-bar, and said lever iswprovided with a lug 41 which nor-' mally engages the rocker-bar. The rearwardly extending tappet arm of this lever is preferably disposed slightly to the left of the center line of the pivot of said lever so thatwhen said tappet arm engages the dog carrier the tendency will be to force the lug 41 against the rocker bar and to hold it there firmly during the operation of the escapement.

In order to lock the controller bar against upward movement and to thereby convert the dead key into a live key and to secure the: operation of the carrier moving means for each operationof the-dead key thereafter, a locking arm 42 is pivoted to the bracket27 and is adapted to be moved into a notch 43 in the controller bar when the said bar is in its normal position and one of the slots 32 therein is directly in line with the escapeby locking the controllerba'r' against upward movement the releasing-lever may be raised without releasing the controller bar. With the parts in this condition of operation the free end of the escapement operating lever will move rearwardly into one of the'slots 32 at each operation of the rocker bar. By providing two or more of the'depending fingers on the releasing'lever two or more dead keys may beemployed.

Having thus described my invention, I

claimas new and desire to secure by Letters 1. The combinationof an escapement'elemerit, a rocking and pivot-ally held lever adapted to actuate said escapemcnt, means for shifting the escapement element and rocking lever vertically a controlling bar having a plurality of engaging portions spaced apart and adapted tobe engaged by said escapement operating lever or permit said lever to be moved withoutengaging said bar, aspring tending normall Y to force the bar into an engaging position, a releasing lever, a spring of greater strength than the first-mentioned spring tending normally to hold the controlling bar in a disengaged position, and a key-operated lever adapted t actuate said releasing lever.

. loo mentoperating lever 38. It is manifest that 2. The combination of an escapement element, a rocking and pivotally held lever adapted to actuate said escapement, a controlling bar adapted to be engaged by said escapement operating lever or permit said lever to be moved without engaging said bar, a spring tending normally to force th bar into an engaging position, a releasing lever, a spring of greater strength than the first-mentioned spring tending normally to hold the controlling bar in a disengaged position, and key-operated means adapted to actuate said releasing lever. v

3. The combination of an escapement element, a rocking and pivotally held lever adapted to actuate said escapement, means for moving said lever and escapement element vertically, a controlling bar having a plurality of engaging portions spaced apart and adapted to be engaged by said escapement operating lever or permit the said lever to be moved without engaging said bar, and key-operated means to cause movement of the controlling bar.

4. The combination of an escapement element, a device adapted to actuate said escapement, a controlling bar having a plu rality of engaging portions spaced apart and adapted to be engaged by said escapement operating device or permit said device to be moved without engaging said bar, a spring tending normally to force'the bar into an engaging position, a releasing lever, a spring of greater strength than the firstmentioned spring tending normally to hold the controlling bar' in a disengaged position,- and a key-operated lever adapted to actuate said releasing lever.

5. The combination of an escapement element, a controlling bar, springs of relatively diflerent strengths acting on said controlling bar, a key-operated lever adapted to permit the stronger spring to overcome the tension of the other spring to move the controlling bar, and means adapted to be actuated by the controlling bar to operate the escapement element.

6. The combination of an escapement element, a controlling bar, springs of relatively different strengths acting on said controlling bar, means adapted to 'be engaged by the controlling bar to actuate the escapement, and means for releasing the tension of one of the springs. 7. The combination of an escapement ele-" ment, a vertically movable controlling bar, springs of relatively different strengths acting on said controlling bar, escapement actuating means adapted to be engaged by said controlling bar, and means for controlling one position of said bar.

8, The combination of controlling means and means adapted to be actuated by said controlling means :40 operate escapement mechamsm or'to prevent the same from being operated, a releasing lever forming a part of the controlling means and having a plurality of engaging parts, and a plurality of key-levers acting upon said releasing lever to control the action of the escapement.

9. The combination of escapement operating mechanism, a releasing lever forming a part of the controlling means for said mechanism, and a plurality of key-levers independent of and acting directly upon said releasing lever each adapted to control the action of the escapement.

10. The combination of an escapement operating lever, a controlling bar adapted to be engaged by said escapement operating lever or the latter moved without being engaged by said controlling bar, a spring normally forcing the controlling bar vertically, a releasing lever, a spring of greater strength forcing the releasing lever and controlling bar against the action of the first-mentioned spring, and a key-operated lever adapted to move the releasing bar to permit the firstmentioned spring to shift the position of the controlling bar. a 11. The combination of a pivotally spring held and rocking escapement operating lever, a vertically movable controlling bar adapted to be engaged by said escapement operating lever or the latter moved without being engaged by said controlling bar, a spring normally forcing the controlling bar vertically, a releasing lever, a spring of greater strength forcing the releasing bar and controlling bar against the action of the first-mentioned spring, and a key-operated lever adapted to move the releasing bar to permit the first-mentioned spring to shift the position of the controlling bar. 12. The combination of a character print- 111g key, a rocker bar, a movable escapement operating device carried by said.rocker bar, and means including a pivotally held releasing lever actuated by the character printing key in its printing movement to move the escapement operating device into an inoperative position. I

13. The combination of a character printing key, a rocker bar, an escapement operating device carried by ''said rocker bar, 115 and means including a sprin held releasing lever actuated by the key in its printing movement to cause a relative movement between the rocker bar and the escapement operating device to render said escapement op- 120 crating device inoperative.

14. The combination of a character printing key,'a rocker bar, an escapement operating device carried thereby, means norcause (he escapmnent 0 11mm into an innpoi'ativa means for hacking the control- ;11] HiUIPUJUllt.

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1-). Hu cmnl imliim of 52 ii 510 :1 irnvi lair. an (mun mini-2mm; ix-

n actuated tin-(nigh will printing key.

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